Mites,
close relatives of fleas and ticks, are
just as, if not more, pernicious once they
have
infested even one of your reptiles. The
best way to get rid of them is to never
get them to begin
with. Unfortunately, every time you visit
a pet store, reptile expo, herp society
meeting, or interact
with an infested herp, you risk unwittingly
transporting mites into your reptile area.
Mites, like ticks, are eight-legged blood-sucking
organisms. They carry and transmit diseases
from one reptile to another. The mite species
found infesting reptile hosts are unlikely
feed on
non-reptilian hosts. However, it is due
to their ability to use non-reptiles as
a form a public
transportation that cause reptile keepers
to inadvertently infect their own collections
with mites.
Ticks are commonly found on wild-caught
reptiles or captive bred reptiles who have
been thrown
in with wild-caught reptiles or kept separate
but not properly quarantined. Ticks are
larger than
mites and, once they are locked into the
reptile's skin and are feeding on blood
or digesting a
meal, they don't move around much. Mites
are tiny and metamorphosize through several
stages,
some of which are non-feeding morphs. Mites
are highly mobile and may be found roaming
around from place to place on the reptile
and in the reptile's environment. Depending
on the
species of mite, they may be black, bright
red/orange, or the color of old, dried blood.
A wild reptile is infested with mites and
ticks but, being in its native environment
and subject only
to the rigors and stresses of an environment
into which its species has adapted over
millions of
years, the ticks and mites present no problem.
When a snake or lizard sheds its skin, it
also
sheds its mites and ticks. While it may
eventually become host to another couple
of mites or ticks,
it isn't forced, as is a captive reptile,
into contact with its own shed nor with
the hundreds or
thousands of mites replicating all through
its enclosure and neighboring enclosures...and
the
carpet, drapes and any other cozy spot found
by roving mites.
A captive reptile is under stress from the
moment it is captured or boxed up for transport.
The
stresses and generally unsanitary conditions
found in the pet trade are, in and of themselves,
unhealthful for the animals involved. Add
external parasites to the mix and you have
animals who
are further weakened. The mites may be tiny,
so small that they may be easily overlooked,
but
they can be dangerous. Watch for them when
you are at pet stores buying your reptile
or supplies
for your reptiles (wood products are favorite
hiding places for these pests). Watch for
them when
you are at the homes of other reptile keepers.
Watch for them when you are at reptile expos
and
swapmeets (most are no better than, and
often worse than, pet stores in the way
the animals may
have been maintained). And watch for them
when you handle animals at herp society
meetings or
when students bring in their own reptiles
to share with the class.
On lizards, reptile mites can usually be
found roaming the body, tucked under the
edges of scales
and congregating around the eyes, ears,
tympanic membrane and any place on the body
where
the scales are thinner. On snakes, the mites
will generally be tucked under the overlapping
or
projecting edges of scales, around the eyes,
and in the heat pits. If you can see them
from about
three feet away, or your hand comes away
with several mites on it, then you have
a severe
infestation. Reptiles who are moderately
to severely debilitated may require fluids
and nutrient
supplementation to help restore fluid balance
and provide energy for rapid recovery.
Why
Mites Are So Hard To Kill
The chemicals that will kill a mite will
also kill the reptiles. The heat that it
takes to kill a mite will
also kill your reptile. Mites can be drowned,
but if you are not careful, enough mites
can just
scurry up the reptile's and emerge from
the water, hanging out around the eyes and
nose (and
heat pits and eye grooves of pythons and
boas) until things settle down. Speaking
of eyes and
heat pits, mites can live their entire lives
inside the tiny pits and grooves around
a snake's eyes or in their heat pits, feeding
and breeding and making more little mites
to send off into the world.
Other favorite places include the chin grooves
of all snakes, in between the dorsal crests
of
lizards, and in the folds of soft skin around
their armpits, necks and ears. While snakes
can be
fully submerged in water, and some lizards
will voluntarily do so, lizards may have
to have water
poured heavily sprayed over their heads
and necks to flush away the mites.
Another reason it is so hard to kill them
is that they spend a lot of their non-feeding
and
reproduction time in tiny moist crevices,
both on the reptile and in its enclosure.
At any one time,
you will have mites in several different
life stages in your reptile's enclosure
and on its body. The
stages, and the time it takes to morph to
the next stage at certain temperatures,
are:
| Life
Stages / Morphs |
|
Environmental
Temperature |
 |
| |
|
86
F / 30 C |
|
68
F / 20 C |
| Egg |
|
28
hours |
|
98
hours |
| Larva
(non-feeding) |
|
18
hours |
|
47
hours |
| Protonymph
(feeding) |
|
3
days |
|
14
days |
| Deuteronymph
(non-feeding) |
|
13
hours |
|
26
hours |
| Adult
(feeding, mating) |
|
10
days |
|
32
days |
The
protonymph will morph into a deuteronymph
in the time indicated only if it finds a
blood meal
soon after it molts. If it does not, it
can survive without a meal for 15-19 days
before dying of
starvation.
Since reptile enclosure temperatures fluctuate
from their daytime gradients to their nighttime
gradients, the time between morphing may
be prolonged.
Snake mites are rather simple creatures.
They basically travel in a line. If they
hit an obstacle, like
a wall, branch, water bowl, or body, they
climb it rather than finding a way around
it. If they are
cold, they sense heat and make their way
towards it. When they get too hot, they
go off toward a
cooler area. Moist, dark areas are preferred.
If they find a hole leading out of the enclosure,
they
just keep walking, either walking off the
edge of the table and falling to the floor,
or walking up or
down anything that comes into contact with
the enclosure or the surface it is resting
on: curtains,
electrical cords, etc. With any luck (for
you and your reptiles), it will starve to
death before finding
another host. If your cages are close together
and there is lots of handling and opening
and
closing of doors and nice ventilation panels,
the mites all too often find their way to
another host,
enabling them to do what they are genetically
programmed to do: make more mites.
A gravid female mite leaves her host, making
her way to some dark, warm, moist crevice,
pit, or
other imperfection somewhere in or out of
the reptile's enclosure. There she lays
her eggs. The
soft-bodied hatchlings remain where they
hatch until they are old enough to molt
to the
protonymph stage. So long as the crevice
or wherever they are remains moist, they
will not die of
dehydration.
After molting to protonymph, the mite remains
in its natal crevice until its exoskeleton
firms up.
Once it is hard and dry, the mite will no
longer be in danger of dying of dehydration
when it moves
into drier areas. It begins to wander. If
it encounters a host before it starves to
death, it will lodge
itself under or between scales where the
skin is most accessible, and begin to feed.
The mite can
smell a host and will make its way towards
one. The mite basically keep walking, heading
towards the host-smell, warmth, and dark,
stopping only when a special area on its
back comes
into contact with something - like the host's
body.
When
the protonymph has had its fill, it drops
off and wanders, in its straight-line way,
towards
someplace dark, moist crevice. There is
molts to the deuteronymph stage. The non-feeding
deuteronymphs can be active but they usually
remain in the crevice until ready to complete
its
last molt into a feeding, breeding adult.
During the latter part of the protonymph
stage, or when in the deuteronymph stage,
the mites pair
off into sexual pairs. Soon after molting
into adults, they will mate, after which
they head off for a
post-coital blood meal. Once they have had
their fill, the gravid females head off
to find a dark,
moist crevice to lay their 60-80 eggs, while
the males wander off to find more unmated
females.
After laying, females will continue to feed,
her next 2-3 meals spread out about a week
apart.
Effectively Killing Mites
Mites are a drag, plain and simple. They
are microscopically small in most of their
growth states
and are not nearly as easy to deal with
as a flea infestation. With fleas, you can
drop the dog or
cat off at the groomer's for a flea bath,
and go to a movie or something while the
flea bomb you
set off at home is doing its thing. A couple
of hours later, you are flea-free. (At least,
free until you
or your dog or cat brings in more fleas
from outside the home.
Generally speaking, the mite treatment products
available at pet stores are ineffective.
There is
no easy way to get rid of mites. It requires
a two-pronged attack: you must aggressively
treat the
environment as well as the reptile. You
can treat the environment with toxic pesticides
after
removing the reptile to a safe area. While
the environment is being fumigated, you
can work on
the reptile using less toxic means. If your
reptiles are free roaming, treating the
"environment"
may be an overwhelming proposition but one
that must be undertaken, and undertaken
aggressively, nonetheless.
Attempts to treat the environment with herbal
or homeopathic remedies will not work. Many
people try to avoid the use of toxic chemicals
in their lives (and I am one of them), but
when it
comes to ridding an environment of tenacious,
hard-shelled pests who, in concentrations
large
enough, can kill your reptile, you must
act quickly and aggressively.
Another problem with eradication attempts
is that many people think that simply cleaning
and
disinfecting the enclosure/environment will
eradicate the mites. It won't. It will get
rid of the loose
feces and may wash away many of the exposed
mites. It will disinfect the bacteria left
behind
where the mites were squashed or defecated.
It will likely not kill the nonfeeding morphs,
larvae,
and laying females hidden away in deep crevices.
The following methods have proven successful
in ridding an environment and reptile of
mites.
Note that, due to the fact that unhatched
mite eggs and mites in nonfeeding states
will not be
affected by most of the chemicals that will
kill off the adults, you will have to repeat
the treatment
of the environment and reptile at least
once, possibly twice, within a 2-6 week
period.
Treating the Reptiles
Remove the reptile from its enclosure. Snakes
should be soaked in a dilute Betadine bath
as
described above for lizards. If the snake
persists in climbing out of the tub or is
too small to put in
a bathtub, place it in a plastic, lidded
container into which air holes have been
punched, filling it
3/4 full of the Betadine/water solution.
You may wish to bathe the snake in a plain
water bath first
to allow it to drink first, adding the Betadine
after it has done so. If the snake defecates
in the
water, drain the tub, clean it, and draw
a fresh Betadine bath.
Whether
or not the snake's head was under the water,
dab the eyes and heat pits with mineral
oil
after removing it from the bath. Check the
groove under the chin as well as under all
the belly
scutes and in the vent folds to make sure
there are no mites, dead or alive, lodged
in those areas.
If you find mites in these areas, you can
remove them by gently rubbing them from
between the
scales and folds with a cotton-tipped swab
dipped in mineral oil.
Treating the Environment
Remove and dispose of all the substrate
in the reptile's enclosure (bag it in a
plastic garbage bag
and get it out of the building). Vacuum
the inside of the enclosure thoroughly,
especially in the
angles of the walls. If the tank is made
of wood or ungrouted melamine, lightly scrape
the inside
angles with the edge of a blunt knife, then
vacuum again. You are trying to get up all
the loose
eggs, mites and mite feces (the white dust
in the bottom of the tank).
If you have a glass or Plexiglas® tank,
wipe all surfaces down with hot soapy water.
Wooden
enclosures may be sprayed with soapy water.
Remove all soap residue. For good measure,
take
the time to thoroughly disinfect glass tanks
by swabbing them down with a 1:30 bleach-water
solution (1/2 cup bleach per gallon of water),
let the solution sit for ten minutes, then
thoroughly
rinse out the bleach residue. Disinfecting
does not kill the mites; depending on how
much
disinfecting solution you apply, it may
drown the mites you missed during the cleaning
step.
Disinfection is used to kill potentially
harmful organisms that may be spread around
by the mites.
If you have wooden cage furnishings such
as branches, caves, or rocks, bake them
in the oven,
set at 200-250º F (93-121º C),
for 2-3 hours (depending on thickness, and
longer at the lower
temperature); check on them during this
time to make sure they do not start to scorch
or burn.
Rocks may be boiled, completely submerged,
for 20-30 minutes. If the wood or rock furnishings
are too big to place in the oven or in a
pot, soak them in a bucket, cement mixing
tray, or tub, in a
1:30 solution of bleach and water (use one
half cup bleach for each gallon of water)
for eight
hours or so, to thoroughly saturate into
crevices. Rinse thoroughly, spraying fresh
water into all
the crevices, until they are well saturated
and flushed free of any bleach residue.
Let dry
thoroughly, preferably in the sun, for at
least 24 hours.
Wash all bowls with the bleach-water solution,
rinse well and let air dry.
If you have heating pads inside the tank,
unplug and remove them. Clean with soapy
water, rinse
off the soap, then spray them down with
the bleach-water. Let them sit for at least
ten minutes,
then rinse clean and set aside. If you have
the one of the self-adhesive reptile heating
pads,
check under them as best you can, or get
rid of them entirely, replacing with a people-type
heating pad or other free-standing heating
pad or tape. Mites can crawl into the tiniest
of spaces
between the stuck-on pads and the glass,
there to await their next metamorphosis.
If it doubt, rip
it off, and throw it out.
Disconnect all light fixtures and wipe them
down with a damp cloth to remove any adventuresome
mites and their feces.
Squeeze a "No-Pest" strip (such
as the difficult to find Vapona® strip)
or cat flea collar out of the
inner envelope in which it was packed onto
a piece of foil laid on the floor of the
enclosure. Leave
a bit still inside the packaging so that
you can slide it back in when done. If the
enclosure is a
large one, you may need to set out several
such strips or collars. If using a flea
collar, stretch it
out. You may need to cut them into pieces
to prevent the from curling up again when
you let go of
the ends.
Close
the tank and seal it up as air-tight as
possible to keep the toxic pesticide fumes
inside the
tank where they are needed. Cover large,
screened areas and ventilation panels or
holes with
waste paper or plastic, taping it in place.
Tape over the seams and any gaps between
the doors
and tank. (Masking tape works well for all
of this taping as it seals tightly but will
come off easily
and not leave a tacky residue.) Leave in
place for three hours, longer for large
enclosures.
When the time is up, unseal the tank, disposing
of all the paper and tape into a plastic
bag for
immediate disposal into the trash. Push
the strip or collar back into its original
packaging, place it
in a ziplock-type bag, then store it in
a safe place. Leave the tank open and air
it out for several
hours. If possible, open a window in the
room and turn on a fan to help air out the
fumes. A space
fan may even be placed inside the tank or
blowing into it to speed the air circulation
in it. The
fumes may be undetectable to you but not
to your reptile, so you want them flushed
out of the
reptile's environment.
Put new substrate and any new furnishings
into the enclosure. Simple substrates, such
as paper
towels, are best used for the next couple
of weeks. This will enable you to easily
see if additional
mites have hatched or migrated into the
tank from the surrounding area. Drapes and
upholstered
furnishings near heavily infested reptile
tanks should be checked and, if necessary,
removed for
thorough cleaning. Replace the water bowl,
hide box, into the tank. Reinstall and turn
on the
heating and lighting, warm the tank back
up, and place the reptile back inside.
After the reptile has been treated, it can
be returned to its enclosure.
Alternative Methods and Substances
Heat
High heat may also be used to kill mites
in an enclosure. Glass or other aquaria
may be sealed
up and placed in the sun (obviously, the
animal should be housed elsewhere while
this is being
done!). Do this on days when the outside
temperatures are in the mid-80s-90s (29-32º
C) so that
the temperature inside the enclosure reaches
or exceeds the 131º F (55º C)
for the several hours
needed to kill the mites.
Ivermectin (Ivomec®)
While some vets will recommend injecting
a reptile with ivermectin as a way to get
rid of mites,
the drug is highly toxic. Even the drug's
manufacturer strongly advises against injecting
it into
reptiles for any reason (it is often used
as a dewormer for reptiles). Another way
to use this drug,
however, is externally, in a spray made
by mixing ivermectin and water. Ivermectin
may be
obtained in a vial or syringe from your
veterinarian, or without a prescription
in the bovine or
equine section of feed stores (where it
is sold as a cattle and sheep wormer under
the brand
name Ivomec). You will also need a 1 cc
syringe and a large bore needle (which can
also be
obtained from feed stores or your veterinarian).
Ivermectin is rather thick and the multi-dose
injection bottle in which it comes is topped
by a thick rubber seal. You must insert
the needle
through this seal to get it into the drug
itself. Some smaller gauge needles can get
through the
seal without bending, but it will take a
very long time to pull up even the small
amount of the drug
needed, so use a larger-bore needle if you
can.
Mix 0.5cc (5mg) of injectable ivermectin
(it comes 10mg/cc) per quart of water. Shake
or stir
vigorously and use immediately.
Follow the steps above for cleaning out
the enclosure. Instead of using the pest
strip or collar,
soak a cloth in the ivermectin-water solution,
or pour the solution into a spray bottle.
Thoroughly
wipe down or spray the entire inside of
the tank, wiping down the unplugged heating
pads and light fixtures. While the ivermectin
solution is drying in the enclosure, soak
a clean cloth in the
solution and wipe down the reptile or spray
it thoroughly with the ivermectin solution,
avoiding the
eyes and open mouth. Use a cotton-tipped
swab to carefully apply the solution around
their eyes
and nostrils, taking care not to get any
in their eyes. You can also use an ivermectin
solution to
moisten a swab or cloth and work it into
r the chin grooves, under belly scutes,
ventral folds, and
into dorsal crests.
Put new substrate and the furnishings into
the tank and replace the reptile. Monitor
carefully for
the reappearance of mites, repeating as
necessary.
Please note that ivermectin poses a potential
danger to any animal, but most especially
to
severely debilitated reptiles, particularly
when used systemically (administered orally
or by
injection) on such reptiles. Take extreme
care when using it topically.
Ivermectin has been reported in the veterinary
and herpetocultural literature to be fatally
toxic to
chelonians and should never be used in or
on them, nor in their environment.
No-Pest Strips
While this product has historically been
recommended to be used in the tank while
the reptile is in
residence, an increasing number of reptile
keepers and veterinarians recommend against
doing
so. This is due to the often fatal incidents
of organophosphate poisoning from the fumes
that
outgas from these strips. Some reptiles
may die right away, but enough may take
months to
sicken and die, so long from the event that
the exposure to the organophosphate is not
remembered and the reptile is said to have
died "mysteriously" or "for
no reason."
If you are planning to use the more "natural"
pyrethrin products, keep in mind that this
plant-derived
pesticide is still highly toxic and some
of the products also contain organophosphates.
NIX
One person reported using NIX (an over-the-counter
preparation for human lice infestations),
mixed 50/50 with water, applied to the snake.
It was left on for no more than 10 minutes.
The
snake was then rinsed thoroughly to remove
all solution residue. It was reported to
have been
effective. Another person reported using
NIX full strength on his two snakes. He
left it on for ten
minutes and then put the snakes in their
enclosure, into which a No-Pest strip had
been placed.
One snake died within 24 hours, one survived
but was weak. Organophosphate poisoning
from
No-Pest strips can, and have repeatedly,
caused damage to the reptilian (and other
animals)
central nervous system; many have died.
It is not known in this case whether it
was the full
strength NIX, the No-Pest strip, or both
in combination that cased the death of one
and
subsequent health problems in the other.
Pet Trade Mite Sprays
Many owners have tried RepRinse and Mite-Off
without success. Provent-A-Mite seems to
also
have variable results. Any spray-on-the-reptile
product is going to be worthless unless
the
environment is treated as well. Conversely,
plain water will wash off most mites, but
not the ones
hiding tightly in crevices around the reptile's
body. Sprays won't get to these mites, either,
so you
might as well use something that really
is effective at less cost: plain water,
with Betadine mixed
in if the reptile has sustained numerous
mite bites.
Dehumidifiers/Desiccants
Placing dehumidifiers in the reptile's enclosure
or in the room have also been tried with
varying
success. Caution must be taken when keeping
some reptiles in severely dry environments
and
the presence of toxins, including pesticides,
in such dehumidifiers.
Trichlorfan
Trichlorfan, a cattle insecticide, has also
been reported useful (it is apparently fatal
to geckos). A
0.16% solution (8 cc of the standard 8%
product mixed in 24 ounces of water) is
sprayed on the
reptile and left to dry thoroughly. The
reptile must be kept without water for twenty-four
hours so
that the pesticide doesn't get into the
water that the reptile may then drink. After
twenty-four
hours, the reptile is thoroughly rinsed
off, then placed back into its enclosure
with a bowl of water.
The tub/shower must be thoroughly rinsed
before it is used by any animal or human.
When Considering the Use of
Toxins...
Working with pesticides--internal and external
products alike--always involves some risk.
An
animal may be oversensitive to a product
or to a particular component in a product.
In a group of
animals being treated, one may suffer while
the others remain unaffected. This could
be due to
an extreme sensitivity or an unknown underlying
physiological condition.
Many people have for years used pest strips
inside their reptile enclosures with no
apparent ill
effect. It is best, however, to never leave
a pest strip in an enclosure with an animal,
nor even
open in the same room with an animal. Reptiles
metabolize substances at different rates
than do
mammals and birds. Do not assume that what
is safe for one animal (such as a flea collar
for
dogs or cats) is safe for your reptile.
A Note on Treating with Apparently
Innocuous Substances
Use of an oil, such as olive oil, mineral
oil, or baby oil, to completely coat the
reptiles is often
recommended. However, a severely debilitated
animal may suffer. Indeed, some owners have
reported their reptiles dying after being
liberally coated with oil.
Other seemingly innocuous substances, such
as Listerine® mouthwash, may also be
harmful if
used inappropriately. In a very dilute form
(such as 1 pint of Listerine to a standard
sized bathtub
filled 1/3-1/2 with 80-84 F water), Listerine
acts as a mild antiseptic on the mite bites,
similar to
the effects of the Betadine. One ball python
owner in England reported to the maker of
Listerine
that his snake died after being bathed in
a bath to which Listerine was added. The
unknown
factors which may have caused or contributed
to this outcome, however, are still unknown:
the
snake's state of health to begin with; how
much Listerine was added; how hot or cold
the water
was (was the snake blanched by hot water
or did it suffer rapid hypothermia from
cold water
immersion?); the residual effects of the
toxic substances used in the enclosure,
or used
previously on, or injected into, the snake
itself; etc. Without some idea of the snake's
state of
health before it was put into the bath,
how it was treated subsequently, and the
actual conditions
of the bath, it is impossible to know for
sure whether the Listerine (or, as in the
above paragraph,
the olive or other oils) were the actual
cause of death. It is more likely that something
else was
going on or the owner did not properly dilute
the mouthwash.
Betadine is a topical antiseptic safe for
use on snakes and lizards. When properly
diluted, it is
safe to use for bathing snakes and soakable
lizards. Used improperly (for example, forcing
a
reptile to submerge fully in full strength
Betadine or other iodine product), or using
the Betadine
Scrub instead of the Betadine (Betadine
antiseptic has only a fraction of the amount
iodine in the
Scrub), or when other factors come into
play that have nothing to do with the safety
of the
Betadine, including hypersensitivity to
iodine, the reptile may die.
For that matter, plain water may kill a
reptile if the water is too deep, too cold,
too hot, the animal
too weak, or too panicked to find the surface
of the water to break through to breathe.
Finally,
while the saying "if some is good,
more is better" may be a perfectly
fine dictum when
applied to something like chocolate, it
could cause problems with it comes to using
any
substance, toxic or non-toxic, in a manner
not specifically tested for or approved
of by the
manufacturer. More is not necessarily better,
and less is often smarter.
Self-treating animals always carries the
potential for harm, even death. If you have
any questions
about these or other procedures or products,
they should be discussed with an experienced
reptile veterinarian.
A Note on the use of Organophosphates
Despite growing recommendations against
putting pieces of pest strips and flea collars
inside the
reptile enclosures when the reptile is in
there, herp keepers continue to recommend
this method.
The reason may be that the conditions, including
death, that result from such exposures may
be
subtle enough, or remote enough from the
proximity event itself, that reptile keepers
whose
reptiles have been poisoned through the
chemical exposure do not associate the outcome
with
the event itself.
Sue Barnard, Lead Keeper in ZooAtlanta's
Department of Herpetology, writes in her
book, Reptile
Keeper's Handbook (Krieger Publishing, Malabar
FL. 1996), discusses using this to treat
a room,
rather than an individual enclosure, with
the reptile itself relieve of its load of
mites by soaking in
water.
"[Mites] may migrate up to 15 ft a
day (Lawrence, 1983), therefore it is best
to treat the entire
area (room) with dichlorvos-impregnated
pest strips. To provide immediate relief
to a mite
infested reptile, soak the animal in tepid
water to drown as many mites as possible.
Those mites
which climb to the animal's head can be
wiped off with a moistened piece of gauze.
Soaking
reptiles in water, however, does not eliminate
mites altogether ."
Reptile and exotics veterinarian Douglas
L. Mader, goes into greater detail on the
dangers of
pest-strips and other products containing
organophosphates in his chapter, Ascariasis,
in his
book, Reptile Medicine & Surgery (ed.
D. L. Mader, W.B. Saunders Company, Philadelphia
PA.
pp. 341-346):
"There are a number of other mite treatments
that have been reported in both the veterinary
and
herpetological literature. The more common
include placing cut pieces of either a dog
or cat flea
color or insect pest strips inside or on
top of the affected reptile's cage. The
pieces are left in
place for varying lengths of time (depending
on where you read the information).
"The active ingredient in these collars
and strips is dichlorvos (DDVP, Vapona),
an
organophosphate. Organophosphates are cholinesterase
inhibitors and have the potential for
being very toxic. In some cases the presence
of these strips can cause the reptile to
develop a
rapid, progressive paralsysis. However,
what commonly occurs is a chronic, insidious
deterioration of the animal from the prolonged
contact with the poison. This may take months,
resulting in the reptile dying and showing
no outward signs [thus rarely are such deaths
associated, by the owner, with the use of
the dichlorvos product]. Even on necropsy
there are no
obvious lesions related to the organophosphate.
"Although many herpetologists swear
by this treatment method, the author has
seen far too many
deaths resulting from pest strips, and their
use is strongly discouraged.
"There
is another important medical note regarding
pest strips that should be mentioned. Many
of
these pesticides have been proven to be
teratogenic in mammals. A teratogen is anything
that
causes birth defects. Also, there may be
other negetive effects on reproduction and
fertility that
have not been studied. To the author's knowledge,
there have been no studies performed to
determine if there are any negative effects
on reproduction and fertility in reptiles.
"DDT (a chlorinated hydrocarbon) and
diazinon 25 E have appeared in past literature
as
additional treatments. It is now felt that
both are too toxic and should not be used
now that safer
methods are available."
Other signs of organophosphate toxicity
include excessive salivation, ataxia (inability
to right
oneself) and muscle tremors. It should be
noted that many of the pyrethrin products,
touted as
being "natural" due to their being
drived from chrysanthemums, also contain
organophosphates.
"Natural" pesticide products can
not be assumed to be safer or healthier
than man-made
chemicals just because they are derived
from plants.
References
-
Barnard, Sue. 1996. Reptile Keeper's Handbook.
Krieger Publishing, Malabar FL.
-
Camin, Joseph H. Observations on the Life
History and Sensory Behavior of the Snake
Mite,
Chicago Academy of Sciences, Special Publications
No. 10. Reprinted from Georgia Herpnotes
13(2):6).
-
Klingenberg, Roger J. 1993. Understanding
reptile parasites. Advanced Vivarium Systems,
Lakeside CA.
-
Mader, Douglas L. (ed.) 1996. Reptile
Medicine and Surgery. Krieger Publishing,
Malabar FL
Caresheet
by Melissa Kaplan. |